Tarou and Hanako have been together ever since high school, yet neither one of them can recall who confessed first. They're often seen arguing a lot in public but when they're alone together, they seem to behave like a normal couple.

He is sometimes annoyed when his girlfriend forces him to do something that involves yaoi. In most cases, he is seen blushing when he sees Hanako reading erotic yaoi mangas.

Tarou often sees Narumi as 'cute' and 'his type' because he likes tiny, cute girls like "Ranka" from "Macross Frontier". Even though he admits that she's bad at her job and an airhead, he still thinks that her smile is her only saving grace. As Narumi interacts with men like Naoya Nifuji, Tarou gets antsy and aggressive like a 'protective father'.